my only experience with a diaphram carb was on the kawi lakota we owned, i pulled that carb and cleaned it just as i would my blaster carbs, checked/adjusted the float level to the manual specs, and checked the diaphram for rips/tears, that was good,
it did have more jets/orifices to clean than the blaster carb, reassembled and got it running good,
not sure the diaphrams have any type of adjustments ??? just make sure they are intact
the only problem i see here is obtaining a manual for that sled, it's not gonna tell you much if it has a different motor in it.
you'll need to identify that motor and the carbs on it to obtain the manual for them ???? if in fact the motor is different than that sled originally came with.
or just identify the carbs, specs and info on those should be readily available online